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autogroup_form.php
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<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* Auto group form
*
* @package core_group
* @copyright 2007 mattc-catalyst (http://moodle.com)
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
if (!defined('MOODLE_INTERNAL')) {
die('Direct access to this script is forbidden.'); /// It must be included from a Moodle page
}
require_once($CFG->dirroot.'/lib/formslib.php');
require_once($CFG->dirroot.'/cohort/lib.php');
/**
* Auto group form class
*
* @package core_group
* @copyright 2007 mattc-catalyst (http://moodle.com)
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class autogroup_form extends moodleform {
/**
* Form Definition
*/
function definition() {
global $CFG, $COURSE;
$mform =& $this->_form;
$mform->addElement('header', 'autogroup', get_string('autocreategroups', 'group'));
$options = array(0=>get_string('all'));
$options += $this->_customdata['roles'];
$mform->addElement('select', 'roleid', get_string('selectfromrole', 'group'), $options);
$student = get_archetype_roles('student');
$student = reset($student);
if ($student and array_key_exists($student->id, $options)) {
$mform->setDefault('roleid', $student->id);
}
$context = get_context_instance(CONTEXT_COURSE, $COURSE->id);
if (has_capability('moodle/cohort:view', $context)) {
$options = cohort_get_visible_list($COURSE);
if ($options) {
$options = array(0=>get_string('anycohort', 'cohort')) + $options;
$mform->addElement('select', 'cohortid', get_string('selectfromcohort', 'cohort'), $options);
$mform->setDefault('cohortid', '0');
} else {
$mform->addElement('hidden','cohortid');
$mform->setType('cohortid', PARAM_INT);
$mform->setConstant('cohortid', '0');
}
} else {
$mform->addElement('hidden','cohortid');
$mform->setType('cohortid', PARAM_INT);
$mform->setConstant('cohortid', '0');
}
$options = array('groups' => get_string('numgroups', 'group'),
'members' => get_string('nummembers', 'group'));
$mform->addElement('select', 'groupby', get_string('groupby', 'group'), $options);
$mform->addElement('text', 'number', get_string('number', 'group'),'maxlength="4" size="4"');
$mform->setType('number', PARAM_INT);
$mform->addRule('number', null, 'numeric', null, 'client');
$mform->addRule('number', get_string('required'), 'required', null, 'client');
$mform->addElement('checkbox', 'nosmallgroups', get_string('nosmallgroups', 'group'));
$mform->disabledIf('nosmallgroups', 'groupby', 'noteq', 'members');
$mform->setAdvanced('nosmallgroups');
$options = array('no' => get_string('noallocation', 'group'),
'random' => get_string('random', 'group'),
'firstname' => get_string('byfirstname', 'group'),
'lastname' => get_string('bylastname', 'group'),
'idnumber' => get_string('byidnumber', 'group'));
$mform->addElement('select', 'allocateby', get_string('allocateby', 'group'), $options);
$mform->setDefault('allocateby', 'random');
$mform->setAdvanced('allocateby');
$mform->addElement('text', 'namingscheme', get_string('namingscheme', 'group'));
$mform->addHelpButton('namingscheme', 'namingscheme', 'group');
$mform->addRule('namingscheme', get_string('required'), 'required', null, 'client');
$mform->setType('namingscheme', PARAM_TEXT);
// there must not be duplicate group names in course
$template = get_string('grouptemplate', 'group');
$gname = groups_parse_name($template, 0);
if (!groups_get_group_by_name($COURSE->id, $gname)) {
$mform->setDefault('namingscheme', $template);
}
$options = array('0' => get_string('no'),
'-1'=> get_string('newgrouping', 'group'));
if ($groupings = groups_get_all_groupings($COURSE->id)) {
foreach ($groupings as $grouping) {
$options[$grouping->id] = strip_tags(format_string($grouping->name));
}
}
$mform->addElement('select', 'grouping', get_string('createingrouping', 'group'), $options);
if ($groupings) {
$mform->setDefault('grouping', '-1');
}
$mform->addElement('text', 'groupingname', get_string('groupingname', 'group'), $options);
$mform->setType('groupingname', PARAM_TEXT);
$mform->disabledIf('groupingname', 'grouping', 'noteq', '-1');
$mform->addElement('hidden','courseid');
$mform->setType('courseid', PARAM_INT);
$mform->addElement('hidden','seed');
$mform->setType('seed', PARAM_INT);
$buttonarray = array();
$buttonarray[] = &$mform->createElement('submit', 'preview', get_string('preview'), 'xx');
$buttonarray[] = &$mform->createElement('submit', 'submitbutton', get_string('submit'));
$buttonarray[] = &$mform->createElement('cancel');
$mform->addGroup($buttonarray, 'buttonar', '', array(' '), false);
$mform->closeHeaderBefore('buttonar');
}
/**
* Performs validation of the form information
*
* @param array $data
* @param array $files
* @return array $errors An array of $errors
*/
function validation($data, $files) {
global $CFG, $COURSE;
$errors = parent::validation($data, $files);
if ($data['allocateby'] != 'no') {
if (!$users = groups_get_potential_members($data['courseid'], $data['roleid'], $data['cohortid'])) {
$errors['roleid'] = get_string('nousersinrole', 'group');
}
/// Check the number entered is sane
if ($data['groupby'] == 'groups') {
$usercnt = count($users);
if ($data['number'] > $usercnt || $data['number'] < 1) {
$errors['number'] = get_string('toomanygroups', 'group', $usercnt);
}
}
}
//try to detect group name duplicates
$name = groups_parse_name(trim($data['namingscheme']), 0);
if (groups_get_group_by_name($COURSE->id, $name)) {
$errors['namingscheme'] = get_string('groupnameexists', 'group', $name);
}
// check grouping name duplicates
if ( isset($data['grouping']) && $data['grouping'] == '-1') {
$name = trim($data['groupingname']);
if (empty($name)) {
$errors['groupingname'] = get_string('required');
} else if (groups_get_grouping_by_name($COURSE->id, $name)) {
$errors['groupingname'] = get_string('groupingnameexists', 'group', $name);
}
}
/// Check the naming scheme
if ($data['groupby'] == 'groups' and $data['number'] == 1) {
// we can use the name as is because there will be only one group max
} else {
$matchcnt = preg_match_all('/[#@]{1,1}/', $data['namingscheme'], $matches);
if ($matchcnt != 1) {
$errors['namingscheme'] = get_string('badnamingscheme', 'group');
}
}
return $errors;
}
}